Phase difference film, display device and preparation method of phase difference film

The invention provides a phase difference film, a display device and a preparation method of the phase difference film, and relates to the technical field of optical materials, the phase difference film is generated by polymerizing reverse dispersion type rod-like liquid crystals, and the liquid crystal arrangement mode of liquid crystal molecules in the phase difference film is that the liquid crystal molecules have twisted orientation in the thickness direction. The gradient inclined orientation is realized in the thickness direction; the view angle dependence can be effectively improved through combination of distortion orientation and gradient inclination orientation, so that the phase difference film can keep good optical characteristics at different view angles, and the optical performance is improved. 本申请提供的相位差膜、显示器件以及相位差膜的制备方法，涉及光学材料技术领域，该相位差膜是由逆分散型棒状液晶聚合生成的，该相位差膜中的液晶分子的液晶排列方式为在厚度方向上具有扭曲取向，且在厚度方向上具有渐变倾斜取向；通过扭曲取向结合渐变倾斜取向可以有效改善视角依赖性，使得相位差膜在不同视角下都能保持良好的光学特性，从而提高光学性能。